Presentation on theme: "Lysosomes: Digestive Compartments A lysosome is a membranous sac of hydrolytic enzymes that can digest macromolecules Lysosomal enzymes can hydrolyze proteins,"— Presentation transcript:
Fig. 7-2 Hydrophilic head WATER Hydrophobic tail WATER
Fig. 7-3 Phospholipid bilayer Hydrophobic regions of protein Hydrophilic regions of protein
Fig. 7-7 Fibers of extracellular matrix (ECM) Glyco- protein Microfilaments of cytoskeleton Cholesterol Peripheral proteins Integral protein CYTOPLASMIC SIDE OF MEMBRANE Glycolipid EXTRACELLULAR SIDE OF MEMBRANE Carbohydrate
Discussion Questions A Panoramic View of the Cell Distinguish between prokaryotic and eukaryotic cells. Explain why there are both upper and lower limits to cell size. Explain the advantages of compartmentalization in eukaryotic cells.
Chapter Review Unicellular Multicellular Levels of Organization Metabolisms Organelles Eukaryotes Prokaryotes Ribosomes Endoplasmic Reticulum Golgi Bodies Mitochondria Nucleus Vacuoles Centrioles Plastids Chloroplasts Chlorophyll Lysosomes Cilia Flagella Symbiotic Theory Inside of every cell there is some type of organization that allows cells to perform it’s life functions. Some cells are more complicated that others. In this assignment you will need to explain: 1.a. the process by which a cell takes mRNA (a code for an enzyme) from the nucleus. b. converts it to an enzyme. c. and transports it outside the cell. 2.a. the process by which Starch is taken into the cell. b. Broken down (digested). c. What organelle is it taken to and Why? 3.a. What is the difference between Eukaryotes and Prokaryotes. b. In what type of cell would you find Plastids, Vacuoles and what’s their function. c. In what type of cells would you find Cilia and Flagella and what’s their function.
Vacuoles? Fluid filled, membrane bound structures for storage.
Cytoskeleton? Gives support and shape to the cell. 2 Parts 1. Microfilaments = protein strands (actin & myosin) - Contractile proteins – support and help in cell movement. 2. Microtubules = long thick proteins that stretch form the cell membrane to the nucleus. Help organelles move with in the cell
Centrioles – Cilia / Flagella Centrioles = used in cell division (made of microtubules) Cilia and Flagella – microtubules surrounded by the cell membrane extending outside the cell used for locomotion Play
Evolution of Eukaryotes Symbiotic Theory? Prokaryotic Characteristics? Mitochondria and Chloroplasts? Ribosomes? It’s Logical but incomplete. Why? -Nuclear Membrane? -Various Membrane bound structures? -And other eukaryotic structures? Contain their own DNA, RNA and ribosomes that are similar to Prokaryotes. Symbiosis?2 organisms living in close association. DNA = single, double stranded, circular chromosomes No membrane bound organelles, but do have ribosomes (smaller) No Nucleus Smaller in Prokaryotes yet similar enzymes for making proteins and Nucleic Acids